Analogue-sequencer

Trying this for the first time I do not understand how it works...

First of all: HOW to set this up?

I have Logic started up, the Andromeda and the P3.
A6 in and out is on port 1 of the midi interface
P3 in and out is on port 2 of the midi interface.

A6 is set to local control off and a single program.

All simply huh? But then what?

If I select the A6 as miditrack, the notes that I play on the keyboard won't be 
send to the P3
If I select the P3 as miditrack, the notes that I play on the keyboard won't be 
send to the soundengine of the the A6.
CONFUSED!

Boele